单项选择题
A common class of wire rope is the 6X37 class.What does the 37 represent（）.
A.Number of wires in the inner core B.Number of strands per wire rope C.Tensile strength of the wire D.Number of wires per strand
单项选择题 A Chinese stopper（two lines）will hold best when you（）.
单项选择题 A chain bridle is used when towing astern because it（）.
单项选择题 A cargo boom is a（）.
